I think this is really neat. You should probably take it as a compliment that the biggest criticisms so far are about the website landing page. ;)
I like canvases in general, and I especially like them for mentally organizing and referring to this sort of broad work. (Honestly, I think zoomable canvases would make a better window manager in general, but I digress)
One small piece of friction: My default mouse-based ways of dragging the canvas around (that work in most canvases like Figma) aren't working. I saw that you had a tutorial, and I have learned to hold space now, but I prefer the "hold middle mouse button to drag my canvas view around".
I've got a couple of research tasks running now, and my current open questions as a very new user are:
1) How easy will it be to store the outputs into a Github repository.
2) How easy will it be to refer back to this later?
3) Can I build upon it manually or automatically?
4) Can I (securely) share it with someone else for them to see and build upon it?
5) Can I do something "locally" with it? Not necessarily the model, but my preferred interface for LLMs at this point is Claude Code. Could I have a Claude Code instance running in one of these boxes somehow?
6) What if I want to do private stuff with it and don't like the traffic going through Spine's servers? Could I pay them for the interface, but bring my own keys? (Related: Can I self host somehow?)
7) When this is done, each artifact it found (screenshot, webpage, etc), is going to be helpful. The data-hoarder in me wants to make sure I can search these later. Heck, if I could do that, this would become my preferred "web browser". (But again, I digress.)